是否可以将对象设置为空?

Is it possible to set an object to null?(是否可以将对象设置为空?)

问题描述

进一步在我的代码中，我检查对象是否为空/空.

Further in my code, I check to see check if an object is null/empty.

有没有办法将对象设置为空?

Is there a way to set an object to null?

推荐答案

类的对象不能设置为NULL；但是，您可以将指针(包含对象的内存地址)设置为 NULL.

An object of a class cannot be set to NULL; however, you can set a pointer (which contains a memory address of an object) to NULL.

你不能做的事情的例子:

Example of what you can't do which you are asking:

Cat c;
c = NULL;//Compiling error

您可以执行的操作示例:

Example of what you can do:

Cat c;
//Set p to hold the memory address of the object c
Cat *p = &c;
//Set p to hold NULL
p = NULL;

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